Short Term Memory

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Submitted By nicnicxoxo
Words 463
Pages 2
Experiment 4

Short Term Memory

I. Objective

To determine the capacity and limits of short term memory.

II. Definition

Short term memory (STM) is a limited-capacity store that can maintain unrehearsed information for about 10-20 seconds.In contrast, information stored in long term memory may last weeks,months or years.

However, there is a way that you can maintain information in your short-term store indefinitely.Primarily, by engaging in rehearsal-the process of repetitively verbalizing or thinking about information. Without rehearsal information in short-term memory is lost in 10-20 seconds.(Nairne,2003)

III.Abstract

The objective of the experiment is to measure the capacity and limits of short-term memory.The experimenter conducted the experiment on 5 participants.Each subject was exposed to each of the stimulus consisting of rows of meaningless syllables.The experimenter let the subjects read the first row of letters in the following list just once then close their eyes and remember the correct sequence.Same procedure was done for the next rows.The experimenter records the outcome of the experiment.

IV. Introduction

Without rehearsal, information in short term memory is lost in 10-20 seconds (Nairne,2003) The rapid loss was demonstrated in a study by Peterson and Peterson (1959).They measured how long undergraduates could remember three consonants if they couldn't rehearse them.To prevent rehearsal,the Petersons required the students to count backward by threes from the time the consonants were presented until they saw a light that signaled the recall test.Their results showed that the subjects' recall accurancy was pretty dismal (about 10%) after only15 seconds.(Lewandowsky,Duncan & Brown,2004)

Short-term memory is also limited in the number of items it can hold.George Miller(1956) in his paper called "The magical…...

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